Turn your oven on to 220 degrees Celsius.
Pierce the potatoes with a sharp knife (watch those fingers) all over 4-5 times & bake uncovered on a tray for 1 hour until crispy.

Remove from the oven and leave for 5 mins til cool enough to handle.
Slice length ways through the middle until you have 8 halves.

Carefully scoop out the middles into a bowl along with the salt and butter, then mash with a fork.
Drop in the ham slices and mix through.

Now scoop the hot potato back into the skins pushing down so it’s flat again.
Top with the grated cheese, pop them back on the tray and into the oven for 10 minutes til the cheese has melted.
Sprinkle over the chives and enjoy!